Describe How to Troubleshoot Use Cases with Multiple Virtual Hosts, Multiple Ports, and Default F5N4 Practice Questions (Page 1)

Questions 1–5

1. 1application · medium

   An NGINX server hosts two sites: api.example.com on port 443 and www.example.com on port 80. Both server blocks are defined in separate files under /etc/nginx/conf.d/. A client reports that https://api.example.com returns the default NGINX welcome page instead of the API. The api.example.com server block listens on 443 ssl and includes the correct server_name and ssl_certificate directives. What is the most likely cause?

   • AThe api.example.com server block is missing the 'default_server' parameter on its listen directive.
   • BThe www.example.com server block also listens on 443 and is the default server for that port.
   • CThe api.example.com server block is missing the 'listen 443 ssl' directive and only listens on port 80.
   • DThe firewall is blocking inbound traffic on port 443 from the client's network.
   Reveal Solution Discussion Select an answer first
2. 2foundation · easy

   An NGINX configuration defines two server blocks: one listening on port 80 and another on port 8080. After reloading, NGINX fails to start with the error 'address already in use' for port 8080. What is the most likely cause?

   • AThe firewall is blocking port 8080
   • BThe listen directive for port 8080 is missing the default_server parameter
   • CThe server block for port 8080 has a server_name that conflicts with the port 80 block
   • DAnother process is already bound to port 8080
   Reveal Solution Discussion Select an answer first
4. 3application · medium

   An NGINX server has two server blocks: one for example.com and one as the default server. Both listen on port 80. A user sends a request with an unknown Host header (e.g., 'Host: random.example.org'). The response is the default server's content. Which directive in the default server block controls this behavior?

   • Aserver_name ~^.*$;
   • Bserver_name _;
   • Cserver_name "";
   • Dlisten 80 default_server;
   Reveal Solution Discussion Select an answer first
5. 4foundation · easy

   An NGINX server has two server blocks: one listening on port 80 and one on port 443. A client can reach the site on port 80 but not on port 443. The NGINX configuration is correct and NGINX is running. What is the most likely cause?

   • AThe server block for port 443 is missing a server_name directive
   • BThe server block for port 80 is set as the default_server for all ports
   • CThe firewall is blocking inbound traffic on port 443
   • DThe server block for port 443 is using the wrong SSL certificate
   Reveal Solution Discussion Select an answer first
6. 5foundation · easy

   An NGINX instance has two virtual hosts defined on port 80. A request arrives with a Host header that does not match either server_name. Which server block will handle the request?

   • AThe server block that appears last in the configuration file
   • BThe first server block defined in the configuration
   • CThe server block marked with the default_server parameter in its listen directive
   • DThe server block with the most specific server_name match
   Reveal Solution Discussion Select an answer first